Gearing.



W. L. SCHELLEN BACH.

GEARING.

APPLATloN HLM) :ma 4,1;11

Patented Sept 2 2, 1914.

3 SHEETS` SHELT l,

62) uff/mama w iii W. L. SCHELLENBMH` GEARING. PPLICATION 111,511 11131111.19114 'Patented Sept. 22, 1914. 3 smnrsmm 2.

W. L. SCHELLENBACH.

l GBAMNG. APPLICATION FILEDDEC.4,)9`11,

v 1,1 1 1,326.. Patented sept.22,1914

` 3 SHEETS-"SHEET 3.

UNITED STATES PATENT OFFICE.

WILLIAM L. SCHVELLENBACH, OF HARTWELL. OHIO, AssIGNOR 'Io THE'LODGE & sHII-, LEY MACHINE rooL COMPANY, om CINCINNATI, OHIO, A CORPORATION OF OHIO,

, GEARINO.

Specification of Letters Patent.

.Patented sept. 22, 1914.

Application sied peezemiierfi, 1 911. serialize. 663,937.

T all whom 'it may concern 13e it knownv that I, WILLIAM L. SOHEL- 'Lnx BACI-I, a citizen-of the United States, residing at Hartwellvin the county of Hanni.-

,lon and State 'of Ohio, have invented" cer' tain non' anluseful Improvements in Gearing, of which the following 1s a specification. My invention relates to an improvement ninfiarily in a headlst'ock for engine lathes in providing a variety of speeds` between 1the Imain driving oulley. and `the spindle and in the convenient'and quick control thereof.-

e'v t'ei'n'gogearing,v ,comprising sliding gears, iv'ithilever n ie'chanisnr for shifting said gears*andVA means cou'rdnate therewith controlling' th lIainf dri'vilig pulleyA Itransmitting powe tjo` saidsysteln of. gearing, whereby the )giver is cutoff in advance of a shifting of tlieslidinggears. y

rinoth1-e`r' object o ffmyfinvention isto pro;

vide a *head-'stock Wifi-.1f variable vSpeed SYS- tems of geflfn' sind means for Controlling the drive andl changes' of 4speed ,ofthe entire rengef forward Operative to' `c utou .the-drivein making a change ofthespeedpr-iol"V to Operating 'the' .lever t0 Changetlre rela-tive trains' of power transmission l-i'nechanlsrn.

"Another Obiei't'ef. my invention is no in terposefbetiveenthe spindle" of a machine tool its driving mechanism back lash mechanism to eliminate ori neutralize forces Opposed Ato `the {orpi/'ard rotation of the' spindle, so 'that the finished surface of Work is not marred by impressions primarily caused by the `lost mOtiOn 'between nve'lritlion vtopio.- with' a variable s eedsby Aa single leverv the intermeshing 'teeth of the gears in the driving-or transgznission mechanism or chat'- .ter thereof.

`Another Object ,of y,my invention isto provide back lash mechanism between the driving mechanism'and spindle of a headgearing is preferably' employed for imparting the higher speeds to the .drill spindle, and with means for connecting `the. main Adriving medium tothe'system of gearing the spindle whereby the higher rspeeds are transmitted to the spindle' through back lash mechanism .and the Vlovver speedsv directly. l

vide 4means for disconnectingffthe z iforesaidl back lash mechanism 'fr'OInf-,the spindle vwhen Elected .t0 the. Spindle/1 pri.' 1y' 11n .making "the heavier or rough machi nig of the Work.-

"YIhe transfer beingprefera l made simultaneous with the control of so `that the back lash meel mission when the `spindle" driven at'its high speedsv and out of coin'nns'sion with the `lower speeds.

for producing Athe lower speeds diret-:tly"withV Another Object of my vinvention is toproe stock, in which 'a variable speed system oiy l transmitting Lme'chanism jdilectly con- "IlIe features of thejijnxfent'io'n are more-i' fully set forth in the description of the acl ompanying drawings, lforming a part' of this' specification i'n Which1V v Y saA Figure 1 is a horizontal section-throughY the head-stock andjspindlefanijd through cere tain snind e.: Fig. 2` is a sezwt'A on' vline 0, c, Fig. l,` `through the spindle Fig. 3 iS afr'ef elevation .0f .themed-Stock' wihiiertel Clit aivay to show interior co n'srtring:tion'Y. Fig. .4

detailed plan' View, partly'I m section, of the vclntchV `controlling? meehan'isrnfo'r Controlling (5l is an 'end'.elev'ation of the head-stock with the spindle in section. Fig. 'I 'is a secon line o, o, Fig. 7; Fig. 9'is a section on line ae, Fig. 7. Fig.,a e1 is a detailed top headstocli illustrating the lever mechanism for controlling the clutch mechanism of `the is a'secjtion on line gh'y,` 1'.- i Fig. 5 I sva.

plan' view of theforward portion of ,the

ear mechanism on sides of the v vthe' slow speed transmissiontothe'spindle.-

l tion-on line fw, w, Fignl. Y Fig. 8' is a section;

ra-tefbearings' or arranged to relieve one -froxnjthe' strains of the second, thereby `protransmitting thefhigherl speeds vthrough l capable of neutrnlizinff 20 tive "connection with the spindle, although, A"lateral strainsnf the spindlerare not ini-v )parted orwtnlzen upby the'gearin "trains of gearing, vith the 'mechanismy opertachsbiy engagea mathe-mns fren@ 1,2m@

- not desired to provide forialaifgeri'variety of contained'c as a ,n ni't in the. eupplernental This enables'theimannfactrelof a standard readily equipped-inthe xh'op 'fifjafparticiilar main driving pulley and for shifting the sliding gear. f y

In the 'general design offthehead'swck, the rotating; shaft l or spindleelements are journald ving longbearings `and with 'all concentric rotating elements ineunted in'v sepa- Vidinq/-alieadstock of g'r'nater efiici'ency and nzesin'g-t life.,=" i 1 represents th frarneywv represents the spindle', inwthis instance, driven from a main drivingt pulley l thrcjn'ghf, a variable speed system of gea-ring, moi'inted vv vithin the head-stoel;` and arranged in tWQ'sets," one `for i mechanism in connection with the spindle forces1V opposed to- Af'nivard"'rotation and" the second' for trans- 'mitting thelwerispeeds, preferably' in posi- The g main driving` pulley is provided wit nltermately factuated'lntch mechanism` vfor alter- 2 mately transmlttinglinotin to two different g ated or controlledbyfa single'lever.

llrepresentsa piilley, having anelongated hub 6, loosely journalednpon vthefsleeve 'prol jection'f, ofthe freine' Tle'franie is detrentasei-:fs .Y ingercbahgeablhw te Fan advantage, in

that Vthe' he'afdstcck proper "can 'remain intact and uncnangedfand eflathe as a Whole style of drive .'desired, iithontfthe necessity for providing a separate head-stock ordis tnrbing the spindle'for each type of drive, as,fo`r instance, ,in-e latheinwhich it' was 'speeds as hercixyembodid, itwould only be necessary, to change? thesystemof gearing frame Sgfor aseeendstyleor type of drive type of head-s -to bes to thev pulley 5, and 10 represents a shaft progected through the sleeve shaft 9 and concentric therewith, likewise adapted to be clutched with' the pulle y f5, independent of sleeve shaft 7 and .with the clutching mechanism arranged S -tl1 at 'both`cannot be simultaneously clutched "to 'the pulley- 11 represents a disk fixed tothe sleeve shaft 9'," adapted to frictionally, engage the web 12, of the`pulley 5, for driving the sleeve shaft 9.

disk fixed to the shaft adapted to be' frictionally engaged against vthe plate 14, fixed to the pulley. `The pulley Yis provided with :ih annula'r flange 15, sup-v yportinthe clutchdiskfl, 'which is adapted ifted, to alternatelyengage the disk j members'll end yfor-'connecting the seme tothe-driving pulleyv 5." Theclutch `plate 16 is'p'rovided with -lugs'l' which hear Aupon the" inner surface. of the 'annular fiange 1 5,

of the pulley 5, with' two of sn-ch oppoeitely disposed lugs notchedto, reei'v'e the clutch lever 18, which is pivotally mounted on the clutch plate 16, as 'seen in Eigsand 9. As illustrated, two'osueh clutch levers are provided, both be'ii'igduplicates of each other. Each clutchlever .18 has a projectv ing arm 19, having a ball (ii-cylindrical end,

adapted to engagethjc oppositolydisposed set screws 20, Q1, mounted Within the* ulley" and pulley plate 14respectfule'l-y:inVV haw ing pivotal action therewith. v-As illustrated,

the screw 20 has .a projecting stern passing through the nut il., with thejlever arm-19 stra'fldling' said stern, tlierebyj providing ziiean'sv for Aac ljusting thev screw 20, froin'the Aoutsideifacefof the v pnlley.v It is obvious, however, that varionsfformspf clutch mechanismainay be pro-vided for'elteznat'ely engaging the sleeve shaft 9l and shaft' 10,50 -a's to drive lthe' same independently from 'a gle pulley/"1' and with the clutch mechanism preferably controlled by a'f'sin precise' form' of. clutch inechanismjheren shown'and described. f

The clutch levers v18 are rocked hy' the following mechanism. :-29., see Figs. "l' and 8) represents altnuckle sleeve having cluplicate sets of ears S23,l projected thererm,1 oe

tween whichfnre pivoted lthe. yoke links .24,-

25.A 26 represents a pin, xedto the lever 18 and engaged with the yoke ends of the links'l` 25, to swingthelevers 18 when the knuckle sleeve shifted laterally, which action will move the clutchldisk 16, so to engage disk 11 or disk 13 and rictionallyI clamp either one of them with the driving uley 5. As illustrated, the knuckle sleeve 1s'. slidalwly-"mounted upon the outer surface of the hnb 6, of the pnlley 5 and provided niithnn annulargroove adapted to receive the yoke plate 29, .which is connected te the shifting rod 30. The shifting lrod prowle lever, and, therefore, r do not wish@ beintedtq the jects parallel with the spindle and to the nose end thereof and actuated by mechanism to bc more fully hereinafter described.

As the alternate shifting of the clutch l mechanism of t-he pulley controls the rotation of two different shafts for rotating two different speed systems or trains of gearing, I will first describe the system controlled by shaft 10. 31, 32, represent compound gears splined upon the shaft and slidable there on for respectively engaging with gears 33, 34, fixed upon the shaft 35 journaled within hearings formed in the frame 8. Thus, as illustrated, in Fig. 7 gear 31 is in mesh with gear 33 and by rotating shaft 10, one speed will be imparted to shaft 35. Shifting the compound gears to disengage the gear 31 and engage gear 32 with the gear 34, a second speed is obtained. The compound gears 31, 32, are provided with clutch teeth 36, adaptedto be engaged with companion clutch teeth on the gear 37, which is loosely journaled within the bearing in the frame 8 and concentric with shaft` 10 and in mesh with a gear 38, fixed to shaft 35. Thuswhen the compound gears are slid to bring the clutch teeth 36 into engagement with the clutch teeth of gear 37, the gears thereof would be disengaged from the gears 3 34, producing a third ratio of speed between shafts 10 and 35.

{Vi/ith the system as shown, three different speed ratios are obtainable through shafts 10 and hy shifting the compound gears, but it is obvious, that the number may be reduce-d or multiplied, without departing from the features of my invention.

The compound gears 31 and 32 and their clutch member are also utilized when the sleeve shaft 9 is utilized and when said sleeve shaft is rotated, shaft 10 rotates as an interni diete or idler shaft.

39 represents a `gear fixed to the sleeve shaft 9, in mesh with a gear 40, loose upon the shaft 35, or, as illustrated, is loosely journaled upon the sleeve bearing` 41, mount ed in the frame 8 and concentric with the shaft 35. The gear 40 is fixed to a gear 42, likewise loosely journaled upon the hearing 41 and in mesh with a gear 43, fixed upon the shaft 10. Thus when the shaft 10 is disengaged from the driving pulley 5 and sleeve shaft 9 engaged therewith, the shaft l0 in such instance will be rotated through the gearing 39, 40. 4Q and 43, driven by t-he sleeve shaft 9, with the shaft- 35, driven through the gearing heretofore described, with the speeds changed by sliding the compound gears 31, 32, as set forth. Thus, with the system illustrated, six changes of speed may beobtained between the driving pulley 5 and shaft 35, by alternately shifting the pulley clutch mechanism and sliding the compound gears 31, 32.

45 represents a gear fixed upon the shaft 35 in mesh with a gear 46 loosely mounted upon the sleeve 47, concentric with the spindle 2, see Fig. 1, and keyed with cup 'member 48, intermediate of the gear 46 and spindle 2. 49 represents a second member keyed to the sleeve 47, and 50 represents a strap, one end connected to the cup member 43, with the other end thereof connected to the member 49, as shown in Fig. 2, making one complete coil around the spindle.

51 represents a pin fixed to the member 49, projected i '.to an oblong slot formed in the member 45 to prevent displacement of the members relative to each other.

As the gear* 46 is keyed to the member 48, and said menber connected to the member 49, by the strap 50, the member 49 will,be driyen in aI forward direction, and relieved of any reierse motion or vibration of the gearing of the transmissiolnmechanism due to the unwinding or yielding tendency of the strap 50, the strap neutralizing forces opposed to forward rotation. If, however, the drive is reversed until the pins 51 come into positive engagement at the end of the slot in the member48, a rigid connection is made, but in which instance the strap 50 is not brought into action. The sleeve 47 serves also as a clutch member, provided with clutch teeth 52, adapted to engage with the clutch teeth of the clutch member 53, fixed to the sleeve hub 54, of the gear 55. Said sleeve hub is journaled in the bearings 56, arranged intermediate of the bearings 3, 4, and concentric with the spindle 2, which independent journaling of the sleeve hub 54 enables' the same to be revolved concentric witlnthe spindle 2, but free from Contact therewith, eliminating all driving strain from the spindle. Thus, when the sleeve 47 is shifted to the left, to bring its clutch teeth 52 into engagement with the clutch member 53, the hub sleeve 54 will be in driving connection with the driving mechanism, heretofore described, and the power transmitted through the spindle to the following connectionsz-57 represents a toothed plate fixed to the gear 55, with the teeth 58 thereof projected through and engaging with notches formed in the disk plate 59, which plate is keyed or fixed to the sleeve 60, journaled in the hearing 4 and through which the spindle projects. Said spindle in turn is keyed to the spindle 2.' This arrangement relieves the gearing of any lateral strains imparted to the spindle by reason of the ioating con nection between the members 57 and 59. This construction relieves the spindle of driving strains or torsion and relieves the driving mechanismv of spindle strains, thereby insuring more accurate work and finer finishing cuts and eliminates, what is termed in trade, gear marks, on the work machine.

As illustrated, the higher speeds are all ALlilhal for controlling two different types of drive or functioning two or more different elements by a single lever may he variously modified over the construction herein illustrated and described, but the means shown form a very positive ,and simple construction, and, I therefore, do not wish to be limited to the precise form unless specific mention is made thereof in the claims.

As shown in Fig. l, the spindle is secured to the sleeve 60, which sleeve has its free end of cup-shaped form, threaded and adapted to receive the face plate 9o', thereby providing an independent replaceable bearing for said face plate and relieving the spindle from lateral strains as much as possible and rendering the same readily remwable, increasing the life of the spindle.

87 represents the center pin mounted within the spindle in the usual manner.

88 represents a gear fixed to the spindle for conveying motion to the gear mechanism for driving the feed screw common in all well-known types of engine lathes.

Having described my invention, I clailnzl. In a lathe head-stock, a frame, a spindle journaled therein` a driving element therefon concentric with the spindle and journaled in bearings independent of the spindle to maintain the same free from bearing contact with the spindle, and means intermediate of and connecting said driving element and spindle for neutralizing forces opposed to the forward rotation of the spindle.

2. In a lathe head-stock. a frame, a spindle journaled therein. a driving element concentric with the spindle journaled in bearings independent of the spindle bearings and free from fric-tional contact there` with, mechanism interposed between said driving clement and spindle comprising two members, one in connection with the driving element and the second with the spindle, and a strap connectingT said menibers coupling the drive in one direction of movement between said members and r'eleasing the same in a reverse direction,

3. ln a lathe head-stock, a frame, a spindle journaled therein, a driving element therefor concentric with the spindle and journaled in bearings independent of the spindle and free from bearing Contact therewith, coupling means intermediate of the driving element and spindle, connecting said members in one direction of rotation and releasing the same on reverse impulses or partial rotation.

4. In a lathe head-stock, dle journaled therein, a driving element therefor, concentric with the spindle and journaled in bearings independent of the spindle free from contact therewith, coupling means interposed between said driving element and spindle, comprising means a frame, a spini ablevspeed gearing between positively rotating the spindle in one directionof the driving element, and releasing the same in a reverse rotation, and means for relieving the driving element of spindle strains.

5. In a lathe head-stock, a frame, a spindle journaled therein, a driving element therefor concentric therewith and journaled in bearings independent of the spindle and free from contact with the spindle, couplingr fyi;

means capable of neutralizing forces opposed to t e forward rotation of the spindle intermediate of and connecting said driving element and spindle.

6. In a lathe head-stock, a frame, a spin dle journaled therein, a driving pulley, a variable. speed System of gearing between the driving pulley vand spindle, two driven shafts concentric with the driving pulley, each in connection with certain ears of said system of gearing, and clutc ing mechanism for alternately engaging said driving pulley with said concentric shafts.

7 In a lathe head-stock, a frame, a spil;- dle journaled therein, a driving element therefor concentric therewith and journaled in bearings independent of the spindle, and free from bearing contact therewith, a maia driving pulley,

ley, clutching mechanism for alternately engaging said driving pulley with said concentric shafts, a variable speed system of gearing between said s indle drivin element and concentric sha ts operating 1n varying trains relative to the connection of one of said concentric shafts with said driving pulley.

8. Ina athehead-stock,a frame, a spindle journaled-therein, a driving element therefor, concentric with the spindle and journaled in bearings independent ofthe spindle, a main driving pull ly, a system of varisaid driving elements of the spindle and main driving pulley, means for securing a varying ratio of speeds between the spindle driving elelment and pulley, through said variable s eed system of gearing controlled thereby, ack lash means intermediate of the driving element and spindle, a system of gearin between said back lash mechanism andg spindle, means for connecting and disconnecting said back lash mechanism with said spindle and simultaneously controlling the driving connection through said second variable speed system of gearing with the spindle.

9. In a lathe head-stock, a frame, a spindle journaled therein, a driving element therefor concentric therewith, a main driving pulley, a variable speed system of gearing between said spindle driving element and driving pulle back lash mechanism between said varia le speed system of geareach other and with two driven shafts concentricA i with each other and with the driving puling, and spindle driving elements and in connection therewith, a second variable speed system of gearin in connection with said first and driving e ement for the spindle, and means for controlling simultaneously the connection of back lash mechanism, and the second variable speed system of gearing with the spindle, whereby the one is disconnected during the movement of connecting the other.

10. Ina lathe head-stock, a spindle in combination with means for driving the same at varying speeds, comprising first and second concentric shafts, a driving ullev concentric with said shafts, means tldr alternately connectin said shafts with said pulley, a system o varying speed gearing connecting the spindle with the first shaft, and gearing connecting the second shaft with the first.

11. In a lathe head-stock, a spindle, in combination with means for rotating said spindle at vai-fing speeds, comprising a main driving pulley, a pair of shafts concentric With each other and the driving pulley, clutching mechanism for alternately engaging said driving ulley with one of said shafts, a third sha t, a series vof gears loose on said shaft, and a series of gears fixed on said shaft, gearing cooperating with said loose gears to connect said concentric shafts, a series of sliding gears on one of said concentric shafts, adapted to engage with the fixed gears on said third shaft, and a gear loose on said concentric shaft in mesh with a gear on said third shaft, means for clutching said loose gear to its shaft when the sliding gears are out of mesh with the gears on the third shaft, and means for controlling said slidllgrgcars cordinately with the controlling mechanism of the driving pulley, whereby the power is cut off to said gearing in advance of a shifting of the saine.

l2. A device of the nature disclosed coinbining a pair of members each adapted to be translated in a direction different from nurses' the other, a. lever, independent means connecting said lever to each of said members adapting either to function. as a ulcrum about which said iever may turn to translate the other.

13. A device of the nature disclosed coinbining a pair of members each adapted to be translated in a ffliirmeten dili'erent from the other, a lever, independen means connecting said lever te each of said members adapting either to function as a i'ulcrum about which said iev r may turn to translate the other, a sore anisin controlled by one n mechanism controlled` by t la. A device of the nature disclosed combining two concentric shafts, a driving member therefor, clutch mechanism Ifor alternately independently connecting said shafts and driving member` a gear functioning as an element of a variable speed system of gearing slidably mounted on one of said shafts, and a lever movable in a plane diametrically from a position of neutrality for operating said clutch mechanism for alternately connecting said shafts and driving member and in an intersecting plane from the position of neutrality of the former for sliding said gear.

l5. A device of the nature disclosed combining a pair of members cach adapted to be translated in a direction dillerent from the other, a lever, independent means connecting said lever to each of said members adapting either to function as a iulcrum about which said lever may turn to translate the other, and means having a neutral point at which said lever can be swung on either fulcrum and to coi'ifine the same to one fulcrum when deranged from said neutral point.

In testimony whereof, I have hereunto set my hand.

WILLIAM L. SCHELLENBACH.

Witnesses:

OLIVER B. Kamen, CLARENGE E. Fosfren. 

